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Date: Thu, 17 Jan 2008 15:31:51 +0200
From: "Denys Fedoryshchenko" <denys@...p.net.lb>
To: Ingo Molnar <mingo@...e.hu>
Cc: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>, Mel Gorman <mel@....ul.ie>
Subject: Re: bugreport kernel panic on early stage, with HIGHMEM4G:
Patch fixes the problem.
Here is dmesg (i cut it, probably remaining part of it not required).
0] Movable zone: 0 pages used for memmap
[ 0.000000] DMI 2.4 present.
[ 0.000000] ACPI: RSDP 000FE020, 0014 (r0 INTEL )
[ 0.000000] ACPI: RSDT CFEFD038, 0050 (r1 INTEL DG965SS 6B7
1000013)
[ 0.000000] ACPI: FACP CFEFC000, 0074 (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: DSDT CFEF7000, 41AA (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: FACS CFE9C000, 0040
[ 0.000000] ACPI: APIC CFEF6000, 0078 (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: WDDT CFEF5000, 0040 (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: MCFG CFEF4000, 003C (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: ASF! CFEF3000, 00A6 (r32 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: HPET CFEF2000, 0038 (r1 INTEL DG965SS 6B7 MSFT
1000013)
[ 0.000000] ACPI: SSDT CFE9A000, 020C (r1 INTEL CpuPm 6B7 MSFT
1000013)
[ 0.000000] ACPI: SSDT CFE99000, 0175 (r1 INTEL Cpu0Ist 6B7 MSFT
1000013)
[ 0.000000] ACPI: SSDT CFE98000, 0175 (r1 INTEL Cpu1Ist 6B7 MSFT
1000013)
[ 0.000000] ACPI: SSDT CFE97000, 0175 (r1 INTEL Cpu2Ist 6B7 MSFT
1000013)
[ 0.000000] ACPI: SSDT CFE96000, 0175 (r1 INTEL Cpu3Ist 6B7 MSFT
1000013)
[ 0.000000] ACPI: PM-Timer IO Port: 0x408
[ 0.000000] ACPI: Local APIC address 0xfee00000
[ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled)
[ 0.000000] Processor #0 6:15 APIC version 20
[ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01] enabled)
[ 0.000000] Processor #1 6:15 APIC version 20
[ 0.000000] ACPI: LAPIC (acpi_id[0x03] lapic_id[0x82] disabled)
[ 0.000000] ACPI: LAPIC (acpi_id[0x04] lapic_id[0x83] disabled)
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] dfl dfl lint[0x1])
[ 0.000000] ACPI: LAPIC_NMI (acpi_id[0x02] dfl dfl lint[0x1])
[ 0.000000] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
[ 0.000000] IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI 0-23
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.000000] ACPI: IRQ0 used by override.
[ 0.000000] ACPI: IRQ2 used by override.
[ 0.000000] ACPI: IRQ9 used by override.
[ 0.000000] Enabling APIC mode: Flat. Using 1 I/O APICs
[ 0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[ 0.000000] Using ACPI (MADT) for SMP configuration information
[ 0.000000] Allocating PCI resources starting at d4000000 (gap:
d0000000:2ff00000)
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total
pages: 1040384
[ 0.000000] Kernel command line: root=/dev/sdb2
[ 0.000000] mapped APIC to ffffb000 (fee00000)
[ 0.000000] mapped IOAPIC to ffffa000 (fec00000)
[ 0.000000] Enabling fast FPU save and restore... done.
[ 0.000000] Enabling unmasked SIMD FPU exception support... done.
[ 0.000000] Initializing CPU#0
[ 0.000000] PID hash table entries: 4096 (order: 12, 16384 bytes)
[ 0.000000] Detected 2397.647 MHz processor.
[ 23.770446] Console: colour VGA+ 80x25
[ 23.770448] console [tty0] enabled
[ 23.779138] Dentry cache hash table entries: 131072 (order: 7, 524288
bytes)
[ 23.779395] Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 23.788992] set_highmem_pages_init(bad_ppro:0)
[ 23.789056] sizeof(struct page): 32
[ 23.789118] sizeof(struct mem_section): 8
[ 23.789180] PFN_SECTION_SHIFT: 14
[ 23.789243] mem_map: 00000000
[ 23.789304] highstart_pfn: 229376 [page: c1700700]
[ 23.789367] highend_pfn: 1048576 [page: 02000000]
[ 23.789431] highend_pfn-1: 1048575 [page: 01ffffe0]
[ 23.789494] NR_MEM_SECTIONS: 64
[ 23.789555] pfn_to_section_nr(highstart_pfn): 14
[ 23.789619] pfn_to_section_nr(highend_pfn): 64
[ 23.789682] pfn_to_section_nr(highend_pfn-1): 63
[ 23.789745] totalhigh_pages: 0
[ 23.789807] totalram_pages: 221519
[ 23.924275] WARNING: at arch/x86/mm/init_32.c:353 set_highmem_pages_init()
[ 23.924344] Pid: 0, comm: swapper Not tainted 2.6.24-rc8-git1 #1
[ 23.924409] [<c0104fac>] show_trace_log_lvl+0x1a/0x2f
[ 23.924503] [<c0105805>] show_trace+0x12/0x14
[ 23.924591] [<c0105bc1>] dump_stack+0x6c/0x72
[ 23.924678] [<c03ce93e>] mem_init+0x2a7/0x596
[ 23.924768] [<c03c38b6>] start_kernel+0x271/0x2fb
[ 23.924858] [<00000000>] _stext+0x3feff000/0x19
[ 23.924945] =======================
[ 23.925007] bad pfn: 851968
[ 23.925068] totalhigh_pages: 622129
[ 23.925130] totalram_pages: 221519
[ 23.925194] Memory: 3373812k/4194304k available (1990k kernel code, 30976k
reserved, 813k data, 208k init, 2488516k highmem)
[ 23.925300] virtual kernel memory layout:
[ 23.925301] fixmap : 0xffe15000 - 0xfffff000 (1960 kB)
[ 23.925302] pkmap : 0xff800000 - 0xffc00000 (4096 kB)
[ 23.925302] vmalloc : 0xf8800000 - 0xff7fe000 ( 111 MB)
[ 23.925303] lowmem : 0xc0000000 - 0xf8000000 ( 896 MB)
[ 23.925304] .init : 0xc03c3000 - 0xc03f7000 ( 208 kB)
[ 23.925305] .data : 0xc02f18c5 - 0xc03bcdec ( 813 kB)
[ 23.925305] .text : 0xc0100000 - 0xc02f18c5 (1990 kB)
[ 23.925805] Checking if this processor honours the WP bit even in
supervisor mode... Ok.
[ 23.926109] hpet clockevent registered
[ 23.986100] Calibrating delay using timer specific routine.. 4797.85
BogoMIPS (lpj=2398929)
[ 23.986267] Mount-cache hash table entries: 512
[ 23.986424] CPU: After generic identify, caps: bfebfbff 20100000 00000000
00000000 0000e3bd 00000000 00000001 00000000
[ 23.986429] monitor/mwait feature present.
[ 23.987257] using mwait in idle threads.
[ 23.987320] CPU: L1 I cache: 32K, L1 D cache: 32K
[ 23.987408] CPU: L2 cache: 4096K
[ 23.987470] CPU: Physical Processor ID: 0
[ 23.987532] CPU: Processor Core ID: 0
[ 23.987594] CPU: After all inits, caps: bfebfbff 20100000 00000000
00003940 0000e3bd 00000000 00000001 00000000
[ 23.987599] Intel machine check architecture supported.
[ 23.987664] Intel machine check reporting enabled on CPU#0.
[ 23.987729] Compat vDSO mapped to ffffe000.
[ 23.987800] Checking 'hlt' instruction... OK.
[ 23.991366] SMP alternatives: switching to UP code
[ 23.991940] ACPI: Core revision 20070126
[ 23.993505] Parsing all Control Methods:
[ 23.993595] Table [DSDT](id 0001) - 610 Objects with 62 Devices 154
Methods 38 Regions
[ 23.993793] Parsing all Control Methods:
[ 23.993879] Table [SSDT](id 0002) - 10 Objects with 0 Devices 4 Methods 0
Regions
[ 23.994055] Parsing all Control Methods:
[ 23.994147] Table [SSDT](id 0003) - 5 Objects with 0 Devices 3 Methods 0
Regions
[ 23.994323] Parsing all Control Methods:
[ 23.994408] Table [SSDT](id 0004) - 5 Objects with 0 Devices 3 Methods 0
Regions
[ 23.994584] Parsing all Control Methods:
[ 23.994668] Table [SSDT](id 0005) - 5 Objects with 0 Devices 3 Methods 0
Regions
[ 23.994844] Parsing all Control Methods:
[ 23.994930] Table [SSDT](id 0006) - 5 Objects with 0 Devices 3 Methods 0
Regions
[ 23.995088] tbxface-0598 [00] tb_load_namespace : ACPI Tables
successfully acquired
[ 23.996207] evxfevnt-0091 [00] enable : Transition to ACPI
mode successful
[ 23.996377] CPU0: Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping
06
[ 23.996500] SMP alternatives: switching to SMP code
[ 23.996894] Booting processor 1/1 eip 3000
[ 24.007645] Initializing CPU#1
[ 24.067080] Calibrating delay using timer specific routine.. 4795.20
BogoMIPS (lpj=2397601)
[ 24.067085] CPU: After generic identify, caps: bfebfbff 20100000 00000000
00000000 0000e3bd 00000000 00000001 00000000
[ 24.067089] monitor/mwait feature present.
[ 24.067091] CPU: L1 I cache: 32K, L1 D cache: 32K
[ 24.067092] CPU: L2 cache: 4096K
[ 24.067093] CPU: Physical Processor ID: 0
[ 24.067094] CPU: Processor Core ID: 1
[ 24.067096] CPU: After all inits, caps: bfebfbff 20100000 00000000
00003940 0000e3bd 00000000 00000001 00000000
[ 24.067100] Intel machine check architecture supported.
[ 24.067102] Intel machine check reporting enabled on CPU#1.
[ 24.067636] CPU1: Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz stepping
06
[ 24.068359] Total of 2 processors activated (9593.06 BogoMIPS).
[ 24.068559] ENABLING IO-APIC IRQs
[ 24.068778] ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1
[ 24.180160] checking TSC synchronization [CPU#0 -> CPU#1]: passed.
[ 24.200256] Brought up 2 CPUs
[ 24.200332] CPU0 attaching sched-domain:
[ 24.200334] domain 0: span 00000003
[ 24.200336] groups: 00000001 00000002
[ 24.200339] CPU1 attaching sched-domain:
[ 24.200340] domain 0: span 00000003
[ 24.200341] groups: 00000002 00000001
[ 24.200493] net_namespace: 64 bytes
[ 24.200849] NET: Registered protocol family 16
[ 24.201014] ACPI: bus type pci registered
[ 24.201138] PCI: BIOS Bug: MCFG area at f0000000 is not E820-reserved
[ 24.201203] PCI: Not using MMCONFIG.
[ 24.202626] PCI: Using configuration type 1
[ 24.202688] Setting up standard PCI resources
[ 24.209439] evgpeblk-0956 [00] ev_create_gpe_block : GPE 00 to 1F [_GPE]
4 regs on int 0x9
[ 24.210162] evgpeblk-1052 [00] ev_initialize_gpe_bloc: Found 8 Wake,
Enabled 4 Runtime GPEs in this block
[ 24.210318] ACPI: EC: Look up EC in DSDT
[ 24.211574] Completing Region/Field/Buffer/Package
initialization:........................................................................
[ 24.213966] Initialized 32/38 Regions 0/0 Fields 25/25 Buffers 15/35
Packages (649 nodes)
[ 24.214124] Initializing Device/Processor/Thermal objects by executing
_INI methods:.
[ 24.214272] Executed 1 _INI methods requiring 0 _STA executions (examined
68 objects)
[ 24.214443] ACPI: Interpreter enabled
[ 24.214506] ACPI: (supports S0 S3 S5)
[ 24.214648] ACPI: Using IOAPIC for interrupt routing
[ 24.218082] ACPI: PCI Root Bridge [PCI0] (0000:00)
[ 24.218839] PCI quirk: region 0400-047f claimed by ICH6 ACPI/GPIO/TCO
[ 24.218906] PCI quirk: region 0500-053f claimed by ICH6 GPIO
[ 24.219522] PCI: Transparent bridge - 0000:00:1e.0
[ 24.219617] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
[ 24.219888] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.P32_._PRT]
[ 24.220094] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX0._PRT]
[ 24.220180] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX1._PRT]
[ 24.220267] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX2._PRT]
[ 24.220353] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX3._PRT]
[ 24.220438] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEX4._PRT]
[ 24.224894] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 7 9 10 *11 12)
[ 24.225280] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 7 9 *10 11 12)
[ 24.225662] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 7 9 10 *11 12)
[ 24.226043] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 7 9 10 *11 12)
[ 24.226428] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 *9 10 11 12)
[ 24.226810] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 7 9 *10 11 12)
[ 24.227191] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 7 *9 10 11 12)
[ 24.227574] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 7 9 10 *11 12)
[ 24.227980] Linux Plug and Play Support v0.97 (c) Adam Belay
[ 24.228065] pnp: PnP ACPI init
[ 24.228131] ACPI: bus type pnp registered
[ 24.230140] pnp: PnP ACPI: found 11 devices
[ 24.230203] ACPI: ACPI bus type pnp unregistered
[ 24.230403] SCSI subsystem initialized
[ 24.230493] libata version 3.00 loaded.
[ 24.230556] PCI: Using ACPI for IRQ routing
[ 24.230619] PCI: If a device doesn't work, try "pci=routeirq". If it
helps, post a report
[ 24.235340] hpet0: at MMIO 0xfed00000, IRQs 2, 8, 0
[ 24.235515] hpet0: 3 64-bit timers, 14318180 Hz
[ 24.236603] ACPI: RTC can wake from S4
[ 24.237154] Time: tsc clocksource has been installed.
[ 24.239432] system 00:01: iomem range 0xf0000000-0xf7ffffff has been
reserved
[ 24.239510] system 00:01: iomem range 0xfed13000-0xfed13fff has been
reserved
[ 24.239576] system 00:01: iomem range 0xfed14000-0xfed17fff has been
reserved
[ 24.239642] system 00:01: iomem range 0xfed18000-0xfed18fff has been
reserved
[ 24.239708] system 00:01: iomem range 0xfed19000-0xfed19fff has been
reserved
[ 24.239773] system 00:01: iomem range 0xfed1c000-0xfed1ffff has been
reserved
[ 24.239839] system 00:01: iomem range 0xfed20000-0xfed3ffff has been
reserved
[ 24.239905] system 00:01: iomem range 0xfed45000-0xfed99fff has been
reserved
[ 24.239971] system 00:01: iomem range 0xc0000-0xdffff could not be reserved
[ 24.240036] system 00:01: iomem range 0xe0000-0xfffff could not be reserved
[ 24.240106] system 00:06: ioport range 0x500-0x53f has been reserved
[ 24.240170] system 00:06: ioport range 0x400-0x47f has been reserved
[ 24.240235] system 00:06: ioport range 0x680-0x6ff has been reserved
[ 24.270635] PCI: Failed to allocate mem resource #6:20000@...00000 for
0000:01:00.0
[ 24.270735] PCI: Bridge: 0000:00:01.0
[ 24.270797] IO window: 2000-2fff
[ 24.270861] MEM window: e0000000-e1ffffff
[ 24.270924] PREFETCH window: d0000000-dfffffff
[ 24.270988] PCI: Bridge: 0000:00:1c.0
[ 24.271050] IO window: disabled.
[ 24.271114] MEM window: disabled.
[ 24.271177] PREFETCH window: disabled.
[ 24.271242] PCI: Bridge: 0000:00:1c.1
[ 24.271305] IO window: 1000-1fff
[ 24.271369] MEM window: e2000000-e20fffff
[ 24.271435] PREFETCH window: disabled.
[ 24.271499] PCI: Bridge: 0000:00:1c.2
[ 24.271561] IO window: disabled.
[ 24.271624] MEM window: disabled.
[ 24.271688] PREFETCH window: disabled.
[ 24.271752] PCI: Bridge: 0000:00:1c.3
[ 24.271814] IO window: disabled.
[ 24.271878] MEM window: disabled.
[ 24.271941] PREFETCH window: disabled.
[ 24.272005] PCI: Bridge: 0000:00:1c.4
[ 24.272067] IO window: disabled.
[ 24.272130] MEM window: disabled.
[ 24.272193] PREFETCH window: disabled.
[ 24.272258] PCI: Bridge: 0000:00:1e.0
[ 24.272319] IO window: disabled.
[ 24.272383] MEM window: disabled.
[ 24.272447] PREFETCH window: disabled.
[ 24.272520] ACPI: PCI Interrupt 0000:00:01.0[A] -> GSI 16 (level, low) ->
IRQ 16
[ 24.272646] PCI: Setting latency timer of device 0000:00:01.0 to 64
[ 24.272660] ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 17 (level, low) ->
IRQ 17
[ 24.272786] PCI: Setting latency timer of device 0000:00:1c.0 to 64
[ 24.272800] ACPI: PCI Interrupt 0000:00:1c.1[B] -> GSI 16 (level, low) ->
IRQ 16
[ 24.272925] PCI: Setting latency timer of device 0000:00:1c.1 to 64
[ 24.272939] ACPI: PCI Interrupt 0000:00:1c.2[C] -> GSI 18 (level, low) ->
IRQ 18
[ 24.273065] PCI: Setting latency timer of device 0000:00:1c.2 to 64
[ 24.273079] ACPI: PCI Interrupt 0000:00:1c.3[D] -> GSI 19 (level, low) ->
IRQ 19
[ 24.273204] PCI: Setting latency timer of device 0000:00:1c.3 to 64
[ 24.273217] ACPI: PCI Interrupt 0000:00:1c.4[A] -> GSI 17 (level, low) ->
IRQ 17
[ 24.273343] PCI: Setting latency timer of device 0000:00:1c.4 to 64
[ 24.273351] PCI: Setting latency timer of device 0000:00:1e.0 to 64
[ 24.273370] NET: Registered protocol family 2
[ 24.283667] IP route cache hash table entries: 32768 (order: 5, 131072
bytes)
[ 24.283894] TCP established hash table entries: 131072 (order: 8, 1048576
bytes)
[ 24.284300] TCP bind hash table entries: 65536 (order: 7, 786432 bytes)
[ 24.284563] TCP: Hash tables configured (established 131072 bind 65536)
[ 24.284634] TCP reno registered
[ 24.288032] Machine check exception polling timer started.
[ 24.288271] IA-32 Microcode Update Driver: v1.14a
<tigran@...azian.fsnet.co.uk>
[ 24.288744] highmem bounce pool size: 64 pages
[ 24.288809] Total HugeTLB memory allocated, 0
[ 24.289015] Block layer SCSI generic (bsg) driver version 0.4 loaded
(major 254)
[ 24.289115] io scheduler noop registered
[ 24.289188] io scheduler cfq registered (default)
[ 24.289542] Boot video device is 0000:01:00.0
[ 24.289613] PCI: Setting latency timer of device 0000:00:01.0 to 64
On Tue, 15 Jan 2008 12:39:47 +0100, Ingo Molnar wrote
> * Denys Fedoryshchenko <denys@...p.net.lb> wrote:
>
> > Hi
> >
> > After physical memory upgrade from 3GB to 4GB (also it happens on 5GB)
> > got kernel panic.
> >
> > Because it is happening on early stage and my machine doesn't contain
> > serial port, i had to take photo. Kernel boots fine with 64GB highmem,
> > no highmem, or highmem4G with limited memory by mem=3G. All dmesg
> > attached. Also i attach dmidecode and lspci -vvv output, probably it
> > will be useful.
>
> thanks for the detailed report, i think i know what's going on.
> Could you try the patch below, does it fix your problem?
>
> this seems to be a SPARSEMEM bug which is present in v2.6.23 as well
> and has probably been present ever since SPARSEMEM was added to 32-
> bit x86.
>
> There's a ~256MB hole in your e820 memory map (the pci aperture),
> which causes the last 4 sparsemem sections (each covering 64MB of
> RAM) to be not present - and they are thus missing from the
> sparsemem mem_map[] too. The highmem init code on the other hand
> assumes that all pages are in the mem_map[]:
>
> static void __init set_highmem_pages_init(int bad_ppro)
> {
> int pfn;
> for (pfn = highstart_pfn; pfn < highend_pfn; pfn++)
> add_one_highpage_init(pfn_to_page(pfn), pfn,
> bad_ppro);
>
> the pfn_to_page() is unconditional and dereferences to a NULL-ish
> pointer which crashes your box. highend_pfn is what got
> miscalculated by 256 MB, so set_highmem_pages_init() tried to
> reference a non-existing struct page - but it should still be robust
> enough against non-existent pages.
>
> The patch below fixes this bug. Please also send a dmesg if you
> manage to boot the box up fine, i've added a few debug printouts to
> confirm this theory. (i'll figure out whether we need to clip
> highend_pfn as well - but this patch alone should be good enough to
> fix the crash on your box.)
>
> Ingo
>
> ------------->
> Subject: x86: fix CONFIG_SPARSEMEM highmem init bug
> From: Ingo Molnar <mingo@...e.hu>
>
> fix CONFIG_SPARSEMEM highmem init bug.
>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
> arch/x86/mm/init_32.c | 43
> ++++++++++++++++++++++++++++++++++++++++--- mm/sparse.c |
> 8 +++++++- 2 files changed, 47 insertions(+), 4 deletions(-)
>
> Index: linux/arch/x86/mm/init_32.c
> ===================================================================
> --- linux.orig/arch/x86/mm/init_32.c
> +++ linux/arch/x86/mm/init_32.c
> @@ -321,11 +321,48 @@ extern void set_highmem_pages_init(int);
> static void __init set_highmem_pages_init(int bad_ppro)
> {
> int pfn;
> - for (pfn = highstart_pfn; pfn < highend_pfn; pfn++)
> - add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro);
> +
> + printk("set_highmem_pages_init(bad_ppro:%d)\n", bad_ppro);
> + printk("sizeof(struct page): %d\n", sizeof(struct page));
> + printk("sizeof(struct mem_section): %d\n", sizeof(struct
> mem_section)); + printk("PFN_SECTION_SHIFT: %d\n",
> PFN_SECTION_SHIFT); + + printk("mem_map: %p\n", mem_map); +
> printk(" highstart_pfn: %9ld [page: %p]\n", +
highstart_pfn,
> pfn_to_page(highstart_pfn)); + printk(" highend_pfn: %9ld [page:
> %p]\n", + highend_pfn, pfn_to_page(highend_pfn)); +
printk("
> highend_pfn-1: %9ld [page: %p]\n", + highend_pfn-1,
> pfn_to_page(highend_pfn-1)); + + printk("NR_MEM_SECTIONS: %ld\n",
> NR_MEM_SECTIONS); + printk("pfn_to_section_nr(highstart_pfn):
> %9ld\n", + pfn_to_section_nr(highstart_pfn)); +
> printk("pfn_to_section_nr(highend_pfn): %9ld\n", +
> pfn_to_section_nr(highend_pfn)); +
> printk("pfn_to_section_nr(highend_pfn-1): %9ld\n", +
> pfn_to_section_nr(highend_pfn-1)); + + printk("totalhigh_pages:
> %9ld\n", totalhigh_pages); + printk(" totalram_pages: %9ld\n",
> totalram_pages); + + for (pfn = highstart_pfn; pfn < highend_pfn;
> pfn++) { + if (pfn_valid(pfn)) +
> add_one_highpage_init(pfn_to_page(pfn), pfn, bad_ppro); +
else { +
> if (WARN_ON_ONCE(1)) { +
printk("bad pfn: %d\n", pfn); + break;
> + }
> + }
> + }
> + printk("totalhigh_pages: %9ld\n", totalhigh_pages);
> + printk(" totalram_pages: %9ld\n", totalram_pages);
> +
> +
> totalram_pages += totalhigh_pages;
> }
> -#endif /* CONFIG_FLATMEM */
> +#endif /* CONFIG_NUMA */
>
> #else
> #define kmap_init() do { } while (0)
> Index: linux/mm/sparse.c
> ===================================================================
> --- linux.orig/mm/sparse.c
> +++ linux/mm/sparse.c
> @@ -295,9 +295,13 @@ void __init sparse_init(void)
> struct page *map;
> unsigned long *usemap;
>
> + printk("sparse_init()\n");
> for (pnum = 0; pnum < NR_MEM_SECTIONS; pnum++) {
> - if (!present_section_nr(pnum))
> + printk("section %2ld: ", pnum);
> + if (!present_section_nr(pnum)) {
> + printk("!present\n");
> continue;
> + }
>
> map = sparse_early_mem_map_alloc(pnum);
> if (!map)
> @@ -309,6 +313,8 @@ void __init sparse_init(void)
>
> sparse_init_one_section(__nr_to_section(pnum), pnum, map,
> usemap);
> + printk("map: %p, usemap: %p [content: %08lx]\n",
> + map, usemap, __nr_to_section(pnum)->section_mem_map);
> }
> }
--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.
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